Railway truck



RAILWAY TRUCK Filed Oct. 1. 1931 3 Sheets-Sheet l Aug. 2l, 1934. L. RlcHARDsoN Al.I

RAILWAY TRUCK Filed OCT.. 1. 1931 s sheets-snaai 2 m U /n. n f VMM M Mdr ,nca E E 5 a WM @c A118- 21 1934- RICHARDSON Er Al. 1,970,978

RAILWAY TRUCK Filed Oct. l. 1931 3 Sheets-Sheet 5 /m/eW/am K alare/1m Echar/san (Aar/fs f.' ,Bara

Pstentedng. 21, 1934 UNITED. STATES RAILWAY TRUCK Lawrence Richardson, Melrose, and Charles E.

' Barba, Newton, Mass.,

Application October 1, 1931, Serial No. 566,200

"13 maims.

The inventionrelates to railway trucks particularly of the type having a swinging bolster.

The main object of the invention is to provide a simple and inexpensive shock absorbing bolster g assembly that will substantially eliminate any shock between the bolster and the transom,

caused by contact between the bolster and transom due to the force exerted by the car body through the bolster center plate in pulling the im truck, and by the truck during brake application.

This and other more detailed objects are attained by the structure shown in the accompanying drawings in which- Figure 1 is a top view of a truck frame showing M the invention applied thereto and-is sectioned in part for clearer illustration.

Figure 2 is a'half longitudinal vertical section taken along the line 242 of Figure 1.

Figure 3 is a detail section taken along the line go 3--3 of Flgurel. l

Figure 4 is a vertical section of a part oi?V the bolster showing details of the shock absorbing assembly therein..

Figure 5 is a detail view oi the inner end of one of the spring seats used in the shock absorbing assembly, the left half drawing showing one oi thespring seats and the' right hal! drawing the other spring seat.

lIi'igu're 6 is in part aside view and in part a' so vertical section of the bolster showing the shock absorbing assembly in position. Y.

Figure '1 is a detail view or the inner end oi the ke'y-bushing used with one of the spring seats o! the shock absorbing assembly.

Figure 8 is a detail section taken along the line 8-8 oi Figure '7.

Figure 9 is a half side view of the bolster showing the elongated opening through which the shock absorbing assembly is inserted. Figure 10 is a detail section taken along the line 10-10 of Figure 1 and shows kthe bolster safety supporting lug.

The drawings illustrates. truck frame comprising spaced side members 1, pedestal `jaws 2, transverse transoms 3 and end rails4 and 5 prei'- erably as integral parts thereof, though not neces-i sarily so. Journal boxes 6 are received by pedestal jaws 2 for rotatably mounting wheel axles '1.

Transoms 3 are of box-like construction and are provided with slots 8 through which are suspended swinging hangers 9, being supported at their upper ends by pivots 10, and provided near theirl lower extremities with slots 11 for receiv- .ing the ends of cross bars 12. Bolster 13 is'inlgage the edze of the smaller-diameter portion (Cl. 10th-193) terposed between the transoms and swingingly supported on bars l2. y 'f .The transoms are oi greater transverse width near their ends than at the center, and are pro-v vided on the adjacent under sides of said wider portions with safety lugs 14 spaced inwardly from slots e and projecting outwardly from the transoms toward each other. These lugs extend un.- der and slightly below the bottom of the bolster 13 when the latter is normally supported on 65 bars 12.

Since the safety lugs 14 are of suilicient strength to support both the bolster and a car body, it is obvious that direct support of the bolster and car body on the safety lugs would be maintained 7o should failure occur in any one or `.all of the elements normally supporting the bolster.

End portions of bolster 13 are of greater width than .the central portion carrying the center plate 15, and areoi box-like construction having aimed circular openings 16 and 17 in the respective side walls. Openings 17 on one side of the bolster at each end are provided with diametrically opposed recesses 17a each extending throughout approximately one quarter of the 30 circumference of the opening. Openings 16 are preferably oi 4regular circular outline.

Before the bolster 13 is interposed between the transoms, `the shock absorbing devices are assembled and mounted as units in the bolster. Each unit comprises concentrically nested springs 18, 19, and 20 compressed between opposing spring seats 21 and 22, which are arranged to seat against the opposite inside walls of the bolster. The seats 2l and 22 have circular body portions 29 of substantial thickness and have segmental shoulders 21a and 22a, respectively, corresponding in shape and disposition with the recesses 17a in the bolster openings 17.

To insert the spring unit into the bolster, the spring seats are drawn together by a bolt (not shown) extending through the central holes H in the Aseat blocks and through the nested springs 18, 19 and 20. Seats 21 and 22 are disposed with their segmental shoulders in alinement with re- 100 oesses 17a', whereupon the unit may be passed through opening 17. The circular body portions of the seats iit loosely within openings 16 and 17, respectively, and the engagement of segmental shoulders 21a with the portion of the bolster wall'surrounding opening' 16 provides a stop for the seat 21. The unit is then revolved approxi# mately sothat shoulders 22a will be moved out of register with recesses 17a and willen- Openings 16 are provided with bushings 23l (Figure 1) to resist wear caused by the sliding of the spring seats. Bushings 25 in openings 1'7,

I Figures 7 and 8, each have diametrically opposite segmental projections 26 secured -thereto which register with recesses 17a and project inwardly from the bolster walls. These projections engage shoulders 22a, in the assembled position, and prevent rotation of spring seat 22. Bushing25 is held against rotation by studs or screws 27 extending through the top and bottom walls of the bolster and into projections 26. Bushings 25 are applied after the spring units are assembled with the bolster.`

Seats 21 and 22 are provided with suitable lubrication passageways, as 22h in Figure 5, to facilitate the rotational and sliding movement of the seats in their respective bushings, lubrication seals being eifected by the felt oil retaining pads 24 and 28 applied in openings 16 and 17 from the outer ends. i Springs 18, 19,v and 20 maintain the seats 21 and 22 firmly in engagement with the bolster walls and in the normal position of the bolster the projecting parts of the seats only lightly lengage the transoms, Relative longitudinal forces on the bolster and transoms, cause by pulling of the truck through the center plate, will be transmitted through the seats to these springs. The springs are made strong enough to absorb all normal shocks without permitting engagement of the bolster and transoms, thereby materially improving the riding qualities of the truck.

- l end a transverse gib key 56.supporting a pair of depending hangers 57 carrying spring seats 58 and springs 59. Springs 59 engage the lower surface of they truck side frame 1. 'I'he side frames areprovided with suitable enlargements lafor receiving the gib keys 456 and hangers v`57. Side members 1 of the frame are valso provided on the underside of their upper walls with transversely spaced lugs 60 disposed at each side of springs 55, and intermediate ridges or beads 61. In case of failure of any of the frame hangers, the corresponding ridge 61 will engage the adjacent spring 55 permitting the spring to continue to function substantially in its normal manner. 'Ihe novel bolster shock absorbing device yieldingly prevents angular inclination of the bolster relative to the transoms and also eliminates the jerking consequent to bumping together of the bolster and transom in starting the-vehicle and during application of the brakes. I'he truck has been found to have riding qualities superior to those displayed in other trucks. Moreover, the -various safety means provided insure against disabling of the truck in case of failure of any of the hangers.

Obviously, the invention is not limited to the exact details herein described but may be modi- 'fled as to many of such details without departing yfrom the spirit of the invention, and the exclusive use of all such modifications and variopening, the other of said side walls having a nonvcircular opening opposite to the flrst mentioned opening, a shock absorbing device adapted to be admitted through said non-circular opening and partly received between said walls, parts of said device extending through both of said openings and protruding outwardly from opposite sides of said bolster, and means limiting the extension of said parts beyond said walls.

2. A railway truck bolster having spaced side,

said bolster, extending through and protruding outwardly from said side walls for distances limited by said elements, and means for securing said device against rotation in said side walls.

3. In a railway truck, a frame having trans-- verse transoms, a bolster swingingly suspended from and interposed between sai dtransoms and having spaced side walls, said side walls having aligned apertures, a yielding device positioned between said side walls, a seating member for one end of said yielding device extending through one of said apertures and being both slidable and rotatable therein, a seating member at the opposite end of said yielding device, a bushing sidably receiving said second mentioned seating member and extending through theother of said apertures and interlocked with second mentioned seating member to prevent relative rotation thereof in said bushing, and means securing said bushing in the bolster side wall, the outer ends of Vboth of said seating members protruding from opposite sides of said bolster to engage the adjacent transoms when the bolster moves transversely thereof, to neutralize or relieve the shock resulting from contact between the bolster and transoms.

4. In a railway truck, a frame having spaced transoms, a floating bolster interposed between said transoms, and a yielding device contained in said bolster and protruding therefrom to absorb or relieve shock from contact between said bolster and transoms resulting from relative movement of said bolster and transoms longitudinally of the truck, and means limiting the extension of said device beyond said bolster for limiting'the frictional pressure between said device and said transoms.

5.. In a truck, a frame having spaced transoms, a fioatingv bolster between said transoms having spaced side walls; members within said bolster each having a shouldered portion seated against the inner face of one of the bolster side walls and having a portion of reduced diameter projecting through the. associated side wall, and a spring compressed between and engaging both of said members.

6. In a truck, a frame having spaced transoms, a floating bolster interposed between said transoms and having spaced side walls, openings located opposite each other in said side walls, members within said bolster each having a shouldered portion seated against the inner face of one of said bolster side walls, portions of said members extending through said openings and protruding from the sides of saidbolster, and a yielding device compressed between and engaging both of said members.

7. In a truck, a frame having spaced transoms, a floating bolster interposed between said transoms and having spaced side walls provided with generally circular openings, the opening in one of said side walls only being elongated throughout restricted portions of its circumference, a spring seat shaped to pass through said kelon- 'gated opening and with projections disposed to seat against the inner face of the'wall surrounding the same when said seat is rotated, a second spring seat shaped to pass through said elongated opening and vto seat against the inner face of the opposite wall of said bolster, and a spring compressed between said seats, said seats including portions projecting outwardly through said openings in the operative position of the device to engage said transoms.

8. A structure as set forth in claim 7 which also includes means detachably securedto the side wall having said elongated opening to hold the seat therein against rotation.-

9. In a railway truck, spaced transoms, a bolster movable therebetween and having spaced side walls with alined openings, one of said openings being elongated, and a bolster damper device comprising a pair of spring seats shaped to pass through said elongated opening with shoulders disposed to seat against the inner faces of said walls adjacent said openings in the operative position and with portions disposed to project through said openings in said position toengage said transoms, the seat in said elongated opening being rotatable from the inserting position to the operative positionthereof, and spring means between said seats.

10. In a railway truck, spaced transoms, a bolster movable therebetween and having spaced side walls with alined openings, a spring seat member insertable through one of said openings and having shoulders disposed to seat against the inner face of the wall adjacent the other of said openings, another spring seat member insertable into said first-mentioned opening, means yieldingly urging said seat m'embers apart, and

locking means in said first-mentioned opening limiting the outward movement of the corresponding seat, said locking means being movable when said last-mentioned seat is in its operative position to selectively lock and release the same.

11. In a railway truck, spaced transoms, a bolster movable therebetween and having spaced side walls with alined openings, one of said openings being elongated, a spring seat insertable through said elongated opening and shouldered to engage the inner face of the wall adjacentthe other opening, another spring seat insertable through said elongated opening and with projections rotatable to the operative position limiting outward movement of said last-mentioned seat, both of said seats having portions extending through said openings to engage said transoms, a spring yieldingly urging said seats apart, and movable means on said bolster for locking said last-mentioned seat in "said operative position.

12. Structure as defined in claim 11 in which said locking means comprises a bushing insertable in said elongated opening when said lastmentioned seat is in said operative position, and an element detachably securing said bushing in the locking position.

13. In a railway truck bolster, spaced walls with alined openings and a damper device comprising spring seats each with a transom abut-y ment projecting through one of said walls and a shoulder overlapping the inner surface thereof, spring means urging said seats apart and normally maintaining said shoulders against said inner surfaces, said seats being recessed. to accommodate an element for holding the same and said spring means together in a compact unit, and the opening in one of said walls being shaped to permit said device to be passed therethrough and then rotated to a position to cause the shoulder of the corresponding spring seat to overlap the wall around said opening.

LAWRENCE RICHARDSON. CHARLES E. BARBA. 

